What is the ruling on dispensing insurance medicines to a patient who does not need them and sells part of them, given that the insurance company has no problem with it? Are these medicines a right of the patient to dispose of them by selling or gifting?

The reference for determining a patient's need for medication and its quantity is the treating physician. The pharmacist dispenses what is written on the prescription, and there is no blame on him for doing so, even if he believes the quantity is more than the patient needs. The sin lies with the physician if he prescribes what the patient does not need. It is not permissible for the pharmacist to dispense anything other than what is written for him on the prescription. The patient owns the medication dispensed to him and may give it to others, as long as this does not lead to requesting an excessive quantity. As for what the patient obtained through deception or falsehood, it is ill-gotten wealth, and he is obligated to return it to the insurance company or return its value.